// Copyright 2016 The Draco Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "draco/compression/attributes/attributes_encoder.h"

#include "draco/core/varint_encoding.h"

namespace draco {

    AttributesEncoder::AttributesEncoder()
        : point_cloud_encoder_( nullptr ), point_cloud_( nullptr ) {}

    AttributesEncoder::AttributesEncoder ( int att_id ) : AttributesEncoder () {

        AddAttributeId( att_id );
    }

    bool AttributesEncoder::Init( PointCloudEncoder *encoder, const PointCloud *pc ) {

        point_cloud_encoder_ = encoder;
        point_cloud_ = pc;

        return true;
    }

    bool AttributesEncoder::EncodeAttributesEncoderData( EncoderBuffer *out_buffer ) {

        // Encode data about all attributes.
        EncodeVarint( num_attributes(), out_buffer );

        for ( uint32_t i = 0; i < num_attributes(); ++i ) {

            const int32_t att_id = point_attribute_ids_[ i ];
            const PointAttribute *const pa = point_cloud_->attribute( att_id );

            out_buffer->Encode( static_cast<uint8_t>( pa->attribute_type() ) );
            out_buffer->Encode( static_cast<uint8_t>( pa->data_type() ) );
            out_buffer->Encode( static_cast<uint8_t>( pa->num_components() ) );
            out_buffer->Encode( static_cast<uint8_t>( pa->normalized() ) );

            EncodeVarint( pa->unique_id(), out_buffer );
        }

        return true;
    }

}  // namespace draco
